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Proper Orthogonal Decomposition (POD) of the Wake Flow Field of a Model Wind Turbine and a Porous Disc under Different Freestream Turbulence Intensity Conditions
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Date
2023-01-01
Author
Öztürk, Buğrahan
Hassanein, Abdelrahman
Tuǧrul Akpolat, M.
Abdulrahim, Anas
Perçin, Mustafa
Uzol, Oğuz
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The effects of freestream turbulence intensity on the wake development of a model wind turbine and a porous disc are investigated through Proper Orthogonal Decomposition (POD) analysis. The capability of porous discs for reproducing far-wake characteristics of a model wind turbine is examined through coherent structures both in the near-wake and far-wake regions. Instantaneous velocity fields are obtained through wake measurements using two-dimensional two-component particle image velocimetry (2D2C PIV). These velocity fields are considered snapshots of the spatial domain. Results show inherent differences between coherent structures of a model wind turbine and porous disc in the near-wake region, especially when the freestream turbulent intensity level is low. However, these differences reduce, and coherent structures become more comparable when the freestream turbulence intensity level is higher. It is shown that the first five streamwise components of POD modes are paired for the model wind turbine and the porous disc cases under high freestream turbulence intensity conditions in the far-wake region.
URI
https://hdl.handle.net/11511/104690
DOI
https://doi.org/10.1088/1742-6596/2505/1/012026
Conference Name
8th Wake Conference 2023
Collections
Department of Aerospace Engineering, Conference / Seminar
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B. Öztürk, A. Hassanein, M. Tuǧrul Akpolat, A. Abdulrahim, M. Perçin, and O. Uzol, “Proper Orthogonal Decomposition (POD) of the Wake Flow Field of a Model Wind Turbine and a Porous Disc under Different Freestream Turbulence Intensity Conditions,” Visby, İsveç, 2023, vol. 2505, Accessed: 00, 2023. [Online]. Available: https://hdl.handle.net/11511/104690.